440 lines
16 KiB
C
440 lines
16 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/***
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Copyright © 2014 Intel Corporation. All rights reserved.
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***/
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#include <netinet/icmp6.h>
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#include <arpa/inet.h>
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#include <unistd.h>
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#include "sd-ndisc.h"
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#include "alloc-util.h"
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#include "fd-util.h"
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#include "hexdecoct.h"
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#include "icmp6-packet.h"
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#include "icmp6-util-unix.h"
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#include "socket-util.h"
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#include "strv.h"
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#include "ndisc-internal.h"
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#include "tests.h"
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static struct ether_addr mac_addr = {
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.ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}
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};
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static bool verbose = false;
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static void router_dump(sd_ndisc_router *rt) {
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struct in6_addr addr;
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uint8_t hop_limit;
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usec_t t, lifetime, retrans_time;
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uint64_t flags;
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uint32_t mtu;
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uint8_t preference;
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int r;
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assert_se(rt);
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log_info("--");
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assert_se(sd_ndisc_router_get_sender_address(rt, &addr) >= 0);
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log_info("Sender: %s", IN6_ADDR_TO_STRING(&addr));
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assert_se(sd_ndisc_router_get_timestamp(rt, CLOCK_REALTIME, &t) >= 0);
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log_info("Timestamp: %s", FORMAT_TIMESTAMP(t));
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assert_se(sd_ndisc_router_get_timestamp(rt, CLOCK_MONOTONIC, &t) >= 0);
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log_info("Monotonic: %" PRIu64, t);
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if (sd_ndisc_router_get_hop_limit(rt, &hop_limit) < 0)
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log_info("No hop limit set");
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else
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log_info("Hop limit: %u", hop_limit);
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assert_se(sd_ndisc_router_get_flags(rt, &flags) >= 0);
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log_info("Flags: <%s|%s>",
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flags & ND_RA_FLAG_OTHER ? "OTHER" : "",
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flags & ND_RA_FLAG_MANAGED ? "MANAGED" : "");
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assert_se(sd_ndisc_router_get_preference(rt, &preference) >= 0);
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log_info("Preference: %s",
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preference == SD_NDISC_PREFERENCE_LOW ? "low" :
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preference == SD_NDISC_PREFERENCE_HIGH ? "high" : "medium");
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assert_se(sd_ndisc_router_get_lifetime(rt, &lifetime) >= 0);
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assert_se(sd_ndisc_router_get_lifetime_timestamp(rt, CLOCK_REALTIME, &t) >= 0);
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log_info("Lifetime: %s (%s)", FORMAT_TIMESPAN(lifetime, USEC_PER_SEC), FORMAT_TIMESTAMP(t));
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assert_se(sd_ndisc_router_get_retransmission_time(rt, &retrans_time) >= 0);
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log_info("Retransmission Time: %s", FORMAT_TIMESPAN(retrans_time, USEC_PER_SEC));
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if (sd_ndisc_router_get_mtu(rt, &mtu) < 0)
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log_info("No MTU set");
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else
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log_info("MTU: %" PRIu32, mtu);
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r = sd_ndisc_router_option_rewind(rt);
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for (;;) {
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uint8_t type;
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assert_se(r >= 0);
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if (r == 0)
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break;
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assert_se(sd_ndisc_router_option_get_type(rt, &type) >= 0);
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log_info(">> Option %u", type);
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switch (type) {
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case SD_NDISC_OPTION_SOURCE_LL_ADDRESS:
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case SD_NDISC_OPTION_TARGET_LL_ADDRESS: {
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_cleanup_free_ char *c = NULL;
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const uint8_t *p;
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size_t n;
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assert_se(sd_ndisc_router_option_get_raw(rt, &p, &n) >= 0);
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assert_se(n > 2);
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assert_se(c = hexmem(p + 2, n - 2));
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log_info("Address: %s", c);
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break;
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}
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case SD_NDISC_OPTION_PREFIX_INFORMATION: {
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uint8_t prefix_len, pfl;
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struct in6_addr a;
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assert_se(sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime) >= 0);
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assert_se(sd_ndisc_router_prefix_get_valid_lifetime_timestamp(rt, CLOCK_REALTIME, &t) >= 0);
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log_info("Valid Lifetime: %s (%s)", FORMAT_TIMESPAN(lifetime, USEC_PER_SEC), FORMAT_TIMESTAMP(t));
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assert_se(sd_ndisc_router_prefix_get_preferred_lifetime(rt, &lifetime) >= 0);
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assert_se(sd_ndisc_router_prefix_get_preferred_lifetime_timestamp(rt, CLOCK_REALTIME, &t) >= 0);
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log_info("Preferred Lifetime: %s (%s)", FORMAT_TIMESPAN(lifetime, USEC_PER_SEC), FORMAT_TIMESTAMP(t));
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assert_se(sd_ndisc_router_prefix_get_flags(rt, &pfl) >= 0);
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log_info("Flags: <%s|%s>",
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pfl & ND_OPT_PI_FLAG_ONLINK ? "ONLINK" : "",
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pfl & ND_OPT_PI_FLAG_AUTO ? "AUTO" : "");
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assert_se(sd_ndisc_router_prefix_get_prefixlen(rt, &prefix_len) >= 0);
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log_info("Prefix Length: %u", prefix_len);
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assert_se(sd_ndisc_router_prefix_get_address(rt, &a) >= 0);
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log_info("Prefix: %s", IN6_ADDR_TO_STRING(&a));
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break;
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}
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case SD_NDISC_OPTION_RDNSS: {
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const struct in6_addr *a;
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int n, i;
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n = sd_ndisc_router_rdnss_get_addresses(rt, &a);
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assert_se(n > 0);
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for (i = 0; i < n; i++)
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log_info("DNS: %s", IN6_ADDR_TO_STRING(a + i));
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assert_se(sd_ndisc_router_rdnss_get_lifetime(rt, &lifetime) >= 0);
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assert_se(sd_ndisc_router_rdnss_get_lifetime_timestamp(rt, CLOCK_REALTIME, &t) >= 0);
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log_info("Lifetime: %s (%s)", FORMAT_TIMESPAN(lifetime, USEC_PER_SEC), FORMAT_TIMESTAMP(t));
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break;
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}
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case SD_NDISC_OPTION_DNSSL: {
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char **l;
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assert_se(sd_ndisc_router_dnssl_get_domains(rt, &l) >= 0);
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STRV_FOREACH(s, l)
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log_info("Domain: %s", *s);
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assert_se(sd_ndisc_router_dnssl_get_lifetime(rt, &lifetime) >= 0);
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assert_se(sd_ndisc_router_dnssl_get_lifetime_timestamp(rt, CLOCK_REALTIME, &t) >= 0);
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log_info("Lifetime: %s (%s)", FORMAT_TIMESPAN(lifetime, USEC_PER_SEC), FORMAT_TIMESTAMP(t));
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break;
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}}
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r = sd_ndisc_router_option_next(rt);
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}
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}
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static int send_ra(uint8_t flags) {
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uint8_t advertisement[] = {
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/* struct nd_router_advert */
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0x86, 0x00, 0xde, 0x83, 0x40, 0xc0, 0x00, 0xb4,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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/* type = 0x03 (SD_NDISC_OPTION_PREFIX_INFORMATION), length = 32 */
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0x03, 0x04, 0x40, 0xc0, 0x00, 0x00, 0x01, 0xf4,
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0x00, 0x00, 0x01, 0xb8, 0x00, 0x00, 0x00, 0x00,
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0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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/* type = 0x19 (SD_NDISC_OPTION_RDNSS), length = 24 */
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0x19, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c,
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0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
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/* type = 0x1f (SD_NDISC_OPTION_DNSSL), length = 24 */
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0x1f, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c,
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0x03, 0x6c, 0x61, 0x62, 0x05, 0x69, 0x6e, 0x74,
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0x72, 0x61, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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/* type = 0x01 (SD_NDISC_OPTION_SOURCE_LL_ADDRESS), length = 8 */
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0x01, 0x01, 0x78, 0x2b, 0xcb, 0xb3, 0x6d, 0x53,
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};
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advertisement[5] = flags;
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assert_se(write(test_fd[1], advertisement, sizeof(advertisement)) ==
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sizeof(advertisement));
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if (verbose)
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printf(" sent RA with flag 0x%02x\n", flags);
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return 0;
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}
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static void test_callback(sd_ndisc *nd, sd_ndisc_event_t event, void *message, void *userdata) {
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sd_event *e = userdata;
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static unsigned idx = 0;
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uint64_t flags_array[] = {
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0,
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0,
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0,
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ND_RA_FLAG_OTHER,
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ND_RA_FLAG_MANAGED
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};
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uint64_t flags;
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assert_se(nd);
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if (event != SD_NDISC_EVENT_ROUTER)
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return;
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sd_ndisc_router *rt = ASSERT_PTR(message);
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router_dump(rt);
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assert_se(sd_ndisc_router_get_flags(rt, &flags) >= 0);
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assert_se(flags == flags_array[idx]);
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idx++;
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if (verbose)
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printf(" got event 0x%02" PRIx64 "\n", flags);
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if (idx < ELEMENTSOF(flags_array)) {
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send_ra(flags_array[idx]);
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return;
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}
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idx = 0;
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sd_event_exit(e, 0);
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}
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static int on_recv_rs(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
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_cleanup_(icmp6_packet_unrefp) ICMP6Packet *packet = NULL;
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assert_se(icmp6_packet_receive(fd, &packet) >= 0);
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return send_ra(0);
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}
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TEST(rs) {
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_cleanup_(sd_event_unrefp) sd_event *e = NULL;
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_cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL;
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_cleanup_(sd_ndisc_unrefp) sd_ndisc *nd = NULL;
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assert_se(sd_event_new(&e) >= 0);
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assert_se(sd_ndisc_new(&nd) >= 0);
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assert_se(nd);
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assert_se(sd_ndisc_attach_event(nd, e, 0) >= 0);
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assert_se(sd_ndisc_set_ifindex(nd, 42) >= 0);
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assert_se(sd_ndisc_set_mac(nd, &mac_addr) >= 0);
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assert_se(sd_ndisc_set_callback(nd, test_callback, e) >= 0);
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assert_se(sd_event_add_time_relative(e, NULL, CLOCK_BOOTTIME,
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30 * USEC_PER_SEC, 0,
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NULL, INT_TO_PTR(-ETIMEDOUT)) >= 0);
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assert_se(sd_ndisc_stop(nd) >= 0);
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assert_se(sd_ndisc_start(nd) >= 0);
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assert_se(sd_ndisc_start(nd) >= 0);
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assert_se(sd_ndisc_stop(nd) >= 0);
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test_fd[1] = safe_close(test_fd[1]);
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assert_se(sd_ndisc_start(nd) >= 0);
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assert_se(sd_event_add_io(e, &s, test_fd[1], EPOLLIN, on_recv_rs, nd) >= 0);
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assert_se(sd_event_source_set_io_fd_own(s, true) >= 0);
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assert_se(sd_event_loop(e) >= 0);
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test_fd[1] = -EBADF;
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}
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static int send_ra_invalid_domain(uint8_t flags) {
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uint8_t advertisement[] = {
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/* struct nd_router_advert */
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0x86, 0x00, 0xde, 0x83, 0x40, 0xc0, 0x00, 0xb4,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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/* type = 0x03 (SD_NDISC_OPTION_PREFIX_INFORMATION), length = 32 */
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0x03, 0x04, 0x40, 0xc0, 0x00, 0x00, 0x01, 0xf4,
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0x00, 0x00, 0x01, 0xb8, 0x00, 0x00, 0x00, 0x00,
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0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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/* type = 0x19 (SD_NDISC_OPTION_RDNSS), length = 24 */
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0x19, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c,
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0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
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/* type = 0x1f (SD_NDISC_OPTION_DNSSL), length = 112 */
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0x1f, 0x0e, 0xee, 0x68, 0xb0, 0xf4, 0x36, 0x39,
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0x2c, 0xbc, 0x0b, 0xbc, 0xa9, 0x97, 0x71, 0x37,
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0xad, 0x86, 0x80, 0x14, 0x2e, 0x58, 0xaa, 0x8a,
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0xb7, 0xa1, 0xbe, 0x91, 0x59, 0x00, 0xc4, 0xe8,
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0xdd, 0xd8, 0x6d, 0xe5, 0x4a, 0x7a, 0x71, 0x42,
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0x74, 0x45, 0x9e, 0x2e, 0xfd, 0x9d, 0x71, 0x1d,
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0xd0, 0xc0, 0x54, 0x0c, 0x4d, 0x1f, 0xbf, 0x90,
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0xd9, 0x79, 0x58, 0xc0, 0x1d, 0xa3, 0x39, 0xcf,
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0xb8, 0xec, 0xd2, 0xe4, 0xcd, 0xb6, 0x13, 0x2f,
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0xc0, 0x46, 0xe8, 0x07, 0x3f, 0xaa, 0x28, 0xa5,
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0x23, 0xf1, 0xf0, 0xca, 0xd3, 0x19, 0x3f, 0xfa,
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0x6c, 0x7c, 0xec, 0x1b, 0xcf, 0x71, 0xeb, 0xba,
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0x68, 0x1b, 0x8e, 0x7d, 0x93, 0x7e, 0x0b, 0x9f,
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0xdb, 0x12, 0x9c, 0x75, 0x22, 0x5f, 0x12, 0x00,
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/* type = 0x01 (SD_NDISC_OPTION_SOURCE_LL_ADDRESS), length = 8 */
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0x01, 0x01, 0x78, 0x2b, 0xcb, 0xb3, 0x6d, 0x53,
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};
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advertisement[5] = flags;
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printf("sizeof(nd_router_advert)=%zu\n", sizeof(struct nd_router_advert));
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assert_se(write(test_fd[1], advertisement, sizeof(advertisement)) ==
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sizeof(advertisement));
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if (verbose)
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printf(" sent RA with flag 0x%02x\n", flags);
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return 0;
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}
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static int on_recv_rs_invalid_domain(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
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_cleanup_(icmp6_packet_unrefp) ICMP6Packet *packet = NULL;
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assert_se(icmp6_packet_receive(fd, &packet) >= 0);
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return send_ra_invalid_domain(0);
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}
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TEST(invalid_domain) {
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_cleanup_(sd_event_unrefp) sd_event *e = NULL;
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_cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL;
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_cleanup_(sd_ndisc_unrefp) sd_ndisc *nd = NULL;
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assert_se(sd_event_new(&e) >= 0);
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assert_se(sd_ndisc_new(&nd) >= 0);
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assert_se(nd);
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assert_se(sd_ndisc_attach_event(nd, e, 0) >= 0);
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assert_se(sd_ndisc_set_ifindex(nd, 42) >= 0);
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assert_se(sd_ndisc_set_mac(nd, &mac_addr) >= 0);
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assert_se(sd_ndisc_set_callback(nd, test_callback, e) >= 0);
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assert_se(sd_event_add_time_relative(e, NULL, CLOCK_BOOTTIME,
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30 * USEC_PER_SEC, 0,
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NULL, INT_TO_PTR(-ETIMEDOUT)) >= 0);
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assert_se(sd_ndisc_start(nd) >= 0);
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assert_se(sd_event_add_io(e, &s, test_fd[1], EPOLLIN, on_recv_rs_invalid_domain, nd) >= 0);
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assert_se(sd_event_source_set_io_fd_own(s, true) >= 0);
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assert_se(sd_event_loop(e) >= 0);
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test_fd[1] = -EBADF;
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}
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static int on_recv_rs_timeout(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
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_cleanup_(icmp6_packet_unrefp) ICMP6Packet *packet = NULL;
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sd_ndisc *nd = ASSERT_PTR(userdata);
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static int count = 0;
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static usec_t last = 0;
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usec_t min, max;
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assert_se(icmp6_packet_receive(fd, &packet) >= 0);
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if (++count >= 20)
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sd_event_exit(nd->event, 0);
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if (last == 0) {
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/* initial RT = IRT + RAND*IRT */
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min = NDISC_ROUTER_SOLICITATION_INTERVAL -
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NDISC_ROUTER_SOLICITATION_INTERVAL / 10;
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max = NDISC_ROUTER_SOLICITATION_INTERVAL +
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NDISC_ROUTER_SOLICITATION_INTERVAL / 10;
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} else {
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/* next RT = 2*RTprev + RAND*RTprev */
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min = 2 * last - last / 10;
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max = 2 * last + last / 10;
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}
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/* final RT > MRT */
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if (last * 2 > NDISC_MAX_ROUTER_SOLICITATION_INTERVAL) {
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min = NDISC_MAX_ROUTER_SOLICITATION_INTERVAL -
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NDISC_MAX_ROUTER_SOLICITATION_INTERVAL / 10;
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max = NDISC_MAX_ROUTER_SOLICITATION_INTERVAL +
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NDISC_MAX_ROUTER_SOLICITATION_INTERVAL / 10;
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}
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log_info("backoff timeout interval %2d %s%s <= %s <= %s",
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count,
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last * 2 > NDISC_MAX_ROUTER_SOLICITATION_INTERVAL ? "(max) ": "",
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FORMAT_TIMESPAN(min, USEC_PER_MSEC),
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FORMAT_TIMESPAN(nd->retransmit_time, USEC_PER_MSEC),
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FORMAT_TIMESPAN(max, USEC_PER_MSEC));
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assert_se(min <= nd->retransmit_time);
|
|
assert_se(max >= nd->retransmit_time);
|
|
|
|
last = nd->retransmit_time;
|
|
|
|
assert_se(sd_event_source_set_time(nd->timeout_event_source, 0) >= 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
TEST(timeout) {
|
|
_cleanup_(sd_event_unrefp) sd_event *e = NULL;
|
|
_cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL;
|
|
_cleanup_(sd_ndisc_unrefp) sd_ndisc *nd = NULL;
|
|
|
|
assert_se(sd_event_new(&e) >= 0);
|
|
|
|
assert_se(sd_ndisc_new(&nd) >= 0);
|
|
assert_se(nd);
|
|
|
|
assert_se(sd_ndisc_attach_event(nd, e, 0) >= 0);
|
|
|
|
assert_se(sd_ndisc_set_ifindex(nd, 42) >= 0);
|
|
assert_se(sd_ndisc_set_mac(nd, &mac_addr) >= 0);
|
|
|
|
assert_se(sd_event_add_time_relative(e, NULL, CLOCK_BOOTTIME,
|
|
30 * USEC_PER_SEC, 0,
|
|
NULL, INT_TO_PTR(-ETIMEDOUT)) >= 0);
|
|
|
|
assert_se(sd_ndisc_start(nd) >= 0);
|
|
|
|
assert_se(sd_event_add_io(e, &s, test_fd[1], EPOLLIN, on_recv_rs_timeout, nd) >= 0);
|
|
assert_se(sd_event_source_set_io_fd_own(s, true) >= 0);
|
|
|
|
assert_se(sd_event_loop(e) >= 0);
|
|
|
|
test_fd[1] = -EBADF;
|
|
}
|
|
|
|
DEFINE_TEST_MAIN(LOG_DEBUG);
|